61972730 has 16 divisors (see below), whose sum is σ = 114272424. Its totient is φ = 24184320.

The previous prime is 61972727. The next prime is 61972753. The reversal of 61972730 is 3727916.

It can be written as a sum of positive squares in 4 ways, for example, as 39400729 + 22572001 = 6277^2 + 4751^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75167 + ... + 75986.

Almost surely, 2^61972730 is an apocalyptic number.

61972730 is a deficient number, since it is larger than the sum of its proper divisors (52299694).

61972730 is a wasteful number, since it uses less digits than its factorization.

61972730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151201.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 61972730 is about 7872.2760368270. The cubic root of 61972730 is about 395.7311246604.

The spelling of 61972730 in words is "sixty-one million, nine hundred seventy-two thousand, seven hundred thirty".